Whole-field digital measurement of principal stress directions in photoelasticity

T. Y. Chen, C. H. Lin

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


A method that uses three light-field isoclinic images and the associated light-field unloaded model (or white) images for whole-field digital determination of the principal stress directions in photoelasticity is presented. Relevant theory is derived and explicit conditions for directly determining the directions to the range 0-π/2 are given. Tests of this method on a directly loaded two-dimensional disc and a stress frozen photoelastic slice are demonstrated. The results agree well with the values obtained from the manual method and/or the theory.

Original languageEnglish
Pages (from-to)527-537
Number of pages11
JournalOptics and Lasers in Engineering
Issue number6
Publication statusPublished - 1998 Dec

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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